182 



FOOD INGESTION AND ENERGY TRANSFORMATIONS. 



F. M. M., February 2, 1910. In the second sucrose experiment 

 with this subject the same amounts of sugar and lemon juice were taken 

 as in the first experiment. The basal value was determined immedi- 

 ately prior to the values after food. The data given in table 104 show 

 an increment in the carbon-dioxide production, a slight increment in 

 the oxygen consumption, and a perceptible increment in the heat pro- 

 duction in the first three periods. High respiratory quotients are also 

 recorded. 



MALTOSE-DEXTROSE MIXTURE. 



The only pure carbohydrate used in the calorimeter experiments 

 was sucrose. The fear of digestive disturbances, which subsequent 

 experimenting proved groundless, led us to consider the possibility 

 of some other type of sugar and a patent preparation was therefore 

 used. The results of four analyses of this material show, on the aver- 

 age, about 39 per cent of maltose, 27 per cent of dextrose, and 34 per 

 cent of water. Four experiments were made with this material in 

 Middletown, and one with J. J. C. in Boston. 



Dr. R., February 21, 1907. In the first experiment with this food 

 material 458 grams were eaten, with a total energy of 1,382 calories. 

 From the analysis it can be seen that a considerable part of the material 

 was water and that the dry matter was practically pure carbohydrate. 



This subject had previously used the maltose-dextrose mixture in 

 his daily diet and was thus accustomed to it. In all of the four 2-hour 

 periods a striking rise in the carbon-dioxide production was noted. 

 (See table 105.) Singularly the oxygen consumption was almost 

 invariably below the basal requirement, which, in this instance, was 

 determined on the preceding day. This deficiency we are unable to 

 explain. The heat production was increased during all of the four 



TABLE 105. Dr. R., February 21, 1907. Sitting. (2-hour periods.) 



Maltose-dextrose mixture: 



Amount, 458 grams; energy, 1,382 cals. ; from carbohydrates, 100 p. ct. 



Basal values (February 20, 1907): CO 2 , 48 grams; Oi, 45 grams; heat, 1 146 cals. Nitrogen in 

 urine, 0.55 gram per 2 hours (February 21, 1907). 



Heat eliminated corrected for change in body-weight,but not for change in body-temperature. 

 'Sample included amount for about lj hours preceding hiking of maltose-dextrose mixture. 



